#include<iostream>

int main()
{
    int i = 0;
    int *p1 = nullptr;
    int *p = &i;
    if(p1)
        std::cout<<"p1 pass"<<std::endl;
    if(p)
        std::cout<<"p pass"<<std::endl;
    if(*p)
        std::cout<<"i pass"<<std::endl;
    return 0;
}
